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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421694.0, MPI für Astronomie / Publikationen_mpia
The role of the host galaxy kinematics on nuclear activity
Authors:Dumas, G.; Mundell, C. G.; Emsellem, E.; Nagar, N.
Language:English
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Astronomische Nachrichten
Volume:329
Start Page:908
End Page:911
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We investigate the kinematic properties of the stars and ionised gas in the circumnuclear regions of a matched sample of nearby Seyfert and non-active galaxies, using the SAURON Integral-Field Unit (IFU) on the William Herschel Telescope (WHT). In both active and non-active galaxies, the stellar velocity fields present regular rotation patterns. After removal of the non-gravitational components due to nuclear activity (e.g., AGN-driven outflows) in the case of the Seyfert galaxies, the ionised gas kinematics in both populations is dominated by rotation. The non-active galaxies present a global alignment between stellar and gaseous kinematics while majority of Seyfert galaxies present strong kinematics misalignments between the two components. A more refined analysis of our two-dimensional kinematics maps reveal evidence for deviations from axial-symmetry in the gaseous velocity fields. These deviations are moreover stronger in the case of Seyfert galaxies than their associated non-active galaxies. This result suggests the presence of weak dynamical perturbations in the circumnuclear regions of Seyfert galaxies and provides a tentative link between nuclear activity and the host galaxy dynamics in these regions.
Free Keywords:galaxies: active; galaxies: kinematics and dynamics; galaxies: Seyfert; ISM: kinematics and dynamics; stars: kinematics
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008AN....329..908D [ID No:1]
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